alexa Cytopathological Diagnosis of Non Small Cell Lung Cancer: Recent Advances Including Rapid On-Site Evaluation, Novel Endoscopic Techniques and Molecular Tests | Abstract
ISSN: 2161-105X

Journal of Pulmonary & Respiratory Medicine
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Research Article

Cytopathological Diagnosis of Non Small Cell Lung Cancer: Recent Advances Including Rapid On-Site Evaluation, Novel Endoscopic Techniques and Molecular Tests

Marc Pusztaszeri1*, Paola M. Soccal2,3, Nicolas Mach4, Jean-Claude Pache1 and Tom Mc Kee1

1Department of Clinical Pathology, Geneva University Hospital, Switzerland

2Service of Pulmonary Medicine, Geneva University Hospital, Switzerland

3Clinic of Thoracic Surgery, Geneva University Hospital, Switzerland

4Department of Oncology, Geneva University Hospital, Switzerland

*Corresponding Author:
Dr. Marc Pusztaszeri
Service de Pathologie Clinique
Hôpitaux Universitaires de Genève
1 rue Michel-Servet, 1211 Genève 14, Switzerland
Tel: +412 2372 8574
Fax: +412 2372 4906
E-mail: [email protected]

Received date: December 01, 2011; Accepted date: January 01, 2012; Published date: January 03, 2012

Citation: Pusztaszeri M, Soccal PM, Mach N, Pache J, Mc Kee T (2012) Cytopathological Diagnosis of Non Small Cell Lung Cancer: Recent Advances Including Rapid On-Site Evaluation, Novel Endoscopic Techniques and Molecular Tests. J Pulmonar Respirat Med S5:002. doi:10.4172/2161-105X.S5-002

Copyright: © 2012 Pusztaszeri M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Important advances in non small cell lung cancer (NSCLC) diagnosis, staging and treatment have been made over the last decade. Minimally-invasive endoscopic techniques including endobronchial ultrasound guided transbronchial needle aspiration (EBUS-TBNA) and navigational bronchoscopy have emerged as valid alternatives to transthoracic and/or surgical approaches, providing aspiration cytology material instead of histological material for diagnosis and staging of mediastinal and lung lesions. Several drugs designed to target molecular pathways involved in cancer-cell growth and survival have been shown to be effective in a selected fraction of NSCLC patients, mostly with adenocarcinoma (targeted therapy). Somatic activating mutations in several genes involved in those pathways (EGFR/KRAS) can predict patients’ responses to targeted therapies (individualized therapy). Those mutations are commonly detected in histopathological samples (core-needle biopsy/surgical resection). However, when histological tissues are not available, molecular testing can be performed on cytological specimens. This scenario is increasing in frequency, due to the use of less invasive procedure for diagnosis and staging such EBUS-TBNA and/or patients in advanced stage of disease who are not candidates for surgery. Several strategies exist and may be combined to ensure that the less abundant material that results from minimally invasive techniques can be used efficiently for molecular analyses. These include Rapid On-Site Evaluation (ROSE) of EBUS-TBNA cytological material, to ensure optimal sampling and triage of the material (e.g. cell-block preparation), and microdissection techniques, to select an adequate population of tumor cells. Major issues raised by cytological diagnosis of NSCLC and molecular testing on cytological specimen are discussed in this article.

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